Progress of the Forward Calorimeter R&D

Presented by: Igor Emeliantchik

DESY Zeuthen: R. Dollan

D. Drachenberg,

E. Kouznetsova,

W. Lange,

W. Lohmann

NC PHEP, Minsk: K. Afanaciev,

I. Emeliantchik

Institute of Physics, AS CR, Prague: M. Tomášek,

V. Vrba

Instytut Fizyki UJ, Cracow: J. ZachorowskiInstytut Fizyki Jądrowej PAN, Cracow: W. Wierba

Progress of the Forward Calorimeter R&D

• LCAL Status– Diamond-Tungsten Version

• Results of Zeuthen Group• First Results of Minsk Group

– Heavy Crystal Version

• LAT Status– Silicon Sensors

• Results of Prague Group• Zeuthen Silicon Facilities

– Laser measurement of the LATdetector displacement

Block Diagram of the Experimental Setup

CAMAC

Metal Box

90Sr or 241Am, 104 Bq

Diamond

Peak sensing ADC Polon 712

Computer

CSP “Tetrod”

Shaper Amplifier

Con

tro

ller

KK

Diamond Measurements by Minsk Group

-1400

-1000

-600

-200

200

-900 -700 -500 -300 -100 100 300 500 700 900 1100

U,V

I,pA

Cdiamond = 24 pF (measured with E 7-12 measurement bridge)

Freiburg Diamond FAP_4_2

Current vs HV (measured with V7-49 picoampermeter)

Alpha Spectra for Freiburg Diamond FAP_4_2.

Irradiated with 241Am

on the substrate side

Irradiated with 241Am

on the growth side

Beta Spectrum Accumulated with FAP_4_2 Diamond

90Sr self trigger

-800

-400

0

400

800

1200

-700 -500 -300 -100 100 300 500 700

U,V

I,n

A

Cdiamond = 1.3 pF (measured with E 7-12 measurement bridge)

Minsk Diamond

Current vs HV (measured with V7-49 picoampermeter)

Alpha and beta spectra of Minsk diamond

Test SetupCosmic Telescope

Alternative: Ru-Source

Heavy Crystal Version of LCAL

Lightyield

fiber readout

directreadout ~ 25 %

Cross Talk

How much light do fibers see from other crystals

fiber painted with black paint

Cross Talk

cosmics

?

but ….

Cross section

Bottom view

Active area cca 0.25 cm2

Preprototype Silicon Sensors (Prague) Sensor Structure

I-V on Diode w ith guard rings

0

5

10

15

20

25

0 100 200 300 400 500 600 700 800 900 1000

Bias [V]

Curr

ent [n

A] @

20C

2841413_IVD16_70.txt2841522_IVD16_70.txt2869709_IVD16_70.txt2A8221_IVD16_70.txt

2A9321_IVD16_70.txt

I-V curves:Vbreak-down VopIleak @ Vop < cca 30 nA/cm2 nornalized for temperature 20 C

C-V on Diode w ith guard rings

0

10

20

30

40

50

60

70

-200-150-100-500

Bias [V]

Cap

acit

an

ce [

pF

]

2841413_CVD16_70.txt

2841522_CVD16_70.txt

2869709_CVD16_70.txt

2A8221_CVD16_70.txt

2A9321_CVD16_70.txt

Vfull-depletion: substrate resistivity calculation

used frequency 10 kHz

Wolfgang Lange, DESY Zeuthen: Silicon Detector Projects Kraków, 10-Oct-

2003

Zeuthen Silicon Facilities

At DESY Zeuthen we are able to perform (class 10k clean room):

- Ultrasonic wire bonding (Au, Al, down to 17.5 µm wires)- Glueing with high mechanical precision and/or special hardening procedures (silver epoxies)- Measurements of single and double sided sensors on different probe stations- long term measurements (darkness, special atmosphere: N2 or similar)- chip testing (delivered probe cards can be adapted) additional: electronics workshop with automatic SMD placement and soldering tools

mechanical workshop with NC machining/millingat DESY Hamburg a ‘state of the art’ programmable wire bonder

Companies / Institutions we are used to work with:

- Sensors: CiS Erfurt (D), Micron Ltd. (UK), SINTEF Oslo (N), Hamamatsu (J)- chip design: IDE AS, Oslo (N) and ASIC Laboratory of University of Heidelberg (D)- probe cards: Wentworth Deutschland GmbH, München (D)- high precision printed circuit boards: Würth GmbH, Roth am See (D), Optiprint (CH)- thick film hybrids: Elbau GmbH, Berlin (D)

Position Measurement with Laser and CCD Camera (Cracow)Position Measurement with Laser and CCD Camera (Cracow)

Position measurement

0 100 200 300 400 500 600 700 800 900 1000100

110

120

130

140

150

160

170

180

190

200

210

220

cent

er p

ositi

on [p

ixer

s]

camera position [um]

(1) (2)

Linear Regression for direkt_B:Y = A + B * X

Parameter Value Error------------------------------------------------------------A 92,57067 0,72927B 0,12727 0,00128------------------------------------------------------------